Programmer Think

In the first part, we optimized the sending time of heartbeat. The client sends heartbeat after successful handshake. It is adjusted to start heartbeat sending after successful login, so as to ensure that the heartbeat mechanism can truly establish and maintain the effectiveness of the logical business message channel between the client and the ...

This project is based on Django. Due to the interface related development, the front-end development is not involved for the time being. MySQL is used at the back end for data storage, addition, deletion, modification and query. 1) What is Django? Django is a free and open source Web framework developed in python. It provides many mod ...

After we understand inheritance, we all know the characteristics of inheritance. 1: Single inheritance (a son can only have one father) 2: Multi level inheritance (son inherits father, father inherits grandfather) Therefore, the disadvantages of inheritance are obvious. The inheritance of Java language is single inheritance!! Therefore, in ...

introduction In the previous article, we introduced the Semaphore of AQS ， and it should be countdown latch ， next. What is CountDownLatch CountDownLatch is implemented through a counter. The initial value of the counter is the number of threads. Every time a thread is executed, the value of the counter will be reduced by 1. When the value ...

Pharapi open source interface framework Pronunciation: Pai framework, official website: https://www.phalapi.net/ PhalApi is a lightweight open source interface framework for PHP, which is committed to the rapid development of interface services. It supports protocols such as HTTP/SOAP/RPC and can be used to build interfaces / micro services ...

In the process of self-study Java, I sorted out some knowledge of interfaces and packages Interface Definition and basic usage interface definition: an abstract class without fields interface person{ void hello(); String getName(); } /*An interface is essentially an abstract class abstract class person{ public abstract void fun(); ...

static keyword Features of static keyword: 1) Loads as the class loads 2) Priority object exists: It cannot coexist with this (this: represents the address value reference of the current class object) When the object does not have new, the member currently modified by static has memory 3) Statically modified Can be shared by multiple obj ...

abstract class Significance of abstract classes: Abstract them to improve development efficiency Abstract: Constraints You can't use the abstract class new, you can only rely on subclasses to implement it: constraints!Ordinary methods can be written in abstract classesAbstract methods must be in abstract classes package com.Demo05; //A ...

1. Introduction to wiremock WireMock Is based on HTTP of API Simulator. 2. Use in java interface testing framework Wirelock supports multiple filtering conditions such as request mode / path / input parameter / header /, filtering interface and returning response. The response can be a file or any returned content defined by itself. Offici ...

I polymorphic 1. Class polymorphism Requirements: Demand: teachers go to work by bike Analysis: teachers, bicycles Demand upgrade / iteration: Bicycle - > car Steps: 1. Create a Car class and write start and stop 2. Write open and close based on the original Teacher class Note: violation of OCP principles OCP - opening an ...